Valve-gear



(No Model.) 2 Sheets'-Sheet L A. B. LANDIS.

VALVE GEAR.

No. 308,079. Patented Nov. 18, 1884.

A ttarney,

(No Model.) 2 Sheets-Shet 2.

A. B. LANDIS.

VALVE GEAR. No. 308,079., Patented Nov. 18, 1884.

WITNESSES: 1 11v VEN TOR g g/4w fill/W6. Jam,-

W l v 6.6. fmwm/ l Attorney ihvrrn TATES ATENT tries.

ABRAHAM B. LANDIs, or WAYNESBOBOUGH, PENNSYLVANIA.

VALVE-GEAR.

SPECIFICATION forming part of Letters Patent No. 308,079, dated November 18,1884.

Application filed June 3, 1884. (No model.)

tion of the eccentric consists of a bar, F, hav- Be it known that I, ABRAHAM B. LANDIs, a ing ribs F upon each of its sides, and extend citizen of the United States, residing at t ing diagonally across the same. (See Figs. 5 \Vaynesborough, in the county of Franklin and 6.) This bar F passes through a slot, A. and State of Pennsylvania, haveinvented cerformed in the shaft, and is arranged within tain new and useful Improvements in Valvethe eccentric E, so that when the bar is moved Gears, ofwhich the following is a specification, within the slot and across the shaft the eccenreference being had therein to the accompatrio and plate I) are also moved therewith. nying drawings. The shaft A is bOlHl centrally and longitudi- This invention has relation to means emnally, as at A", (or it may be cored centrally ployed for the purpose of shifting an eccenand transversel v,) for the reception of the trio for the purpose of varying the throw of means employed fo moving the plates Facross a valve or for reversing the engine; and the the shaft. The principal device employed invention consists in certain features of confor that purpose are two semi-cylindrical bars, struction, hereinafter described, and specifi- G, ribbed upon their flat faces diagonally, as cally pointed out in the claims. at G, to gear and mesh with the ribs F of the Referring to the drawings, Figure 1 is a plate F. At the inner end of the barsGthere plan, partly in section, of details of a shiftis formed a countersunk recess, G adapted ing eccentric and its adjuncts sufficient in exto receive the cylindrical head H and the retent for a clear understanding of the invenduced body portion I of the operating-rod J tion. Fig. 2 is a face view of the eccentric, arranged within the cehtral bore ofthe shaft A. showing thev shaft in section. Fig. 3 is an edge view of the parts shown of Fig. 2. Fig. 4 is an end elevationof the left-hand portion of Fig. 1, the shaft being shown in section. Fig. 5 is an enlarged detail, certain parts being shown in section. Fig. 6 is an end elevation of the right-hand portion of Fig. 5; Fig. 7, a similar view of the left-hand portion of Fig. 5. Fig. 8 is a side elevation, Fig. 9 an end elevation, of one mod fication of my invention. Fig. 10 is an enlarge detail hereinafter described; Fig. 11, another modification of the invention; Fig. 12, a perspective view of one of the ribbed bar Likeletters indicate like parts in all the figures.

A indicates a driven shaft of an engine, on which is mounted a crank or other disk, B, having upon its face a frame, 0, the inner faces of which are beveled to receive a beveled edged sliding base-piece, D, secured to or formed as a part of the eccentric E. 1 The eccentric and base-plate are slotted, as at E, in order that they may be thrown across a shaft to vary the throw of the valve or to reverse the engine by means of the usual eccentrics, strap, and connecting-rod mounted upon the eccentric E, and connected with the valve. of an engine.

The means employed for varying the posi To a 11/71/0777, 515 may concern:

the reception of a key, K, which is passed through a slot, A formed in the shaft A, and which key is held in place by means ofa collar, L, interiorly screw-threaded, as at L, to receive the screw-threaded flange L of a companion collar constituting a circumferential slide adapted to receive the sleeve L, in the periphery of which are inserted the conical ends of adjustable screws. or trunnions M of an operating lever, M, the free end of which runs over a notched sector, 1W, serving to hold the lever in different positions for the purpose of determining the extent of the longitudinal movement of the bars G within the shaft, and the consequent position of the eccentric by reason of said movement. The collar L is longitudinally slotted, as at L for the reception of the ends of the key K. The pivotal end of the operating-lever M is connected by a link, M, to a bearing. as N. A second bearing, as i is herein shown near the eccentric; but it is evident that my improvements are equally adapted to shafts of engines having the eccentric between the bearings. Now, it will be noticed that by first entering the rod J partly within the bore of the shaft A and applying to the head thereof the two bars G, so as to embrace said head, and then entering said bars within the bore of the shaft through The opposite end of the rod J is slotted for.

the opening B formedin the disk 13, that said bars G are provided with a long bearing within the shaft, and that the ribbed plate F may then be inserted through its slot A in the shaft, and be made to mesh with the ribs and grooves of the bars G, and being forced en tirely through the shaft, the bearings moving longitudinally therein as the plate is forced therein between them. A dust-guard, O, is also placed between the bearing N and the eccentric E, the dust-guard being a plate of suitable material, apertured to tit the shaft loosely and extending beyond the opening in the body of the eccentric, so as to exclude all dust and dirt from getting within the eccen trio to clog or wear the parts arranged there in. A cap, B", is screwed or otherwise socured within the opening I3 to prevent the en trance of dust therein at the end, and the flange of the collar L covers the slot A and excludes dust therefrom. The frame 0 is now secured to the face of the disk by screws or bolts. The key K is inserted in the slot A and through the slot formed in the connectingrod J the collar L is moved up to the key, its ends resting in the slots L, and the collar L is screwed onto the collar L the trnnnions M having been interposed between the two. The parts are now in operative position. By throwing the free end of the lever along the sector the bars G are reciprocated, and by reason of the incline ribs thereon meshing with the similar ribs on the bar F the eccentric is thrown across the shaft to any desired extent, and is retained in such position by means of the notches in the sector.

In Figs. 8 to 11 the eccentricE is suspended upon a bolt, 1, passing through the eccentric base-piece D and the disk B. Asleeve, P, is inserted to give strength and a sufficient bearing for the proper suspension oftheeceentric, and also serving as the wristpin or the means of connecting a rod with the disk and with a piston-rod of an engine. In other words, the eccentric is suspended upon the wrist-pin of the disk B by the construction shown, the spline I serving the purpose of retaining the bolt and wrist-pin from rotation. In this construction the rib bar F is pivoted at F to the eccentric, and the slot A in the shaft A is made wider at the periphery of the shaft in order to allow for the pivotal motion of the bar F, while the rib-bars G are arranged concent-rically in the shaft, as in the first arrangement described.

It is apparent that the bore of the shaft may be cylindrical, as shown, for convenience of manufacture, or it may be of other shape in cross-section, and that instead of setting the head of a connecting'rod in the ribbedplate operating-bars other connections may be devised and substituted. In either case the advantage of a positively central point of government of the eccentric is attained by my invention, and by that means which operates upon both sides of the directly-acting governing-plate, whereby a greater amount of bearing surface is obtained, consequently great durability, and a positive smooth movement is produced in the eccentric and with the least amount of friction.

Having described my invention and its operation, what I claim is- 1. In ashifting eccentric, a governing-plate arranged within and across the shaft, and provided with diagonallydisposed ribs upon its opposite faces, in combination with diagonallyribbed bars arranged with the shaft, substantially as specified.

2. In a shifting eccentric, a governing plate ribbed upon its opposite sides, in combination with semi cylindrical bars ribbed upon their llat faces and having seats in said faces for the head of an operating-rod, substantially as specified. '3. The combination of a centrally-bored shaft, an operating-rod, a semi-cylindrical ribbed plate arranged in the bore, and a governingplate ribbed upon opposite sides and arranged cross the shaft and between the semicylindrical bars, substantially as specified,

4. The combination, with the eccentric having a governing-plate provided with ribs upon its opposite faces arranged therein, a slotted and bored shaflgsemicylindrical ribbed plates, and a dust guard or guards, substantially as specified.

5. The combination of the bored and slotted shaft, an eccentric mountediherein, agoverning plate arranged within the eccentric and passing through the shaft, bars having ribs adapted to mesh with the ribs of the governing plate. and an operating rod connecting with the bars and with a sliding collar mounted on the shaft. together with means for operating the collar, substantially as specified.

6. The combination of the eccentric E, the

governing-plate F, provided with ribs F, the shaft A, and the bars G, provided with ribs G, substantially as shown and described.

7. The combination of the eccentric E, the frame D, the disk B, the plate F, the bars G, rod J, the shaft A, collars L L, key K, lever M, link M and bearings, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

ABRAHAM B. LANDIS.

WVitnesses:

D. M. Goon, J'r., Jinssn F. DURBIN. 

